Anyone considering a run down the slopes or even a trip into the cold wilderness should have a solid coat to block out the elements. Waterproofing, breathability and warmth can vary depending on the material.
Natural Fiber Jackets
Wool jackets are plenty warm, and as a material it doesn't retain much water, but you'll want to make sure it can withstand the excess amounts of moisture you will face and that the material will not be too itchy.